It was very large several football fields in area. almost would appear to be the shape of a low rise office building compleat with windows.Had the distinct impression of people behind the windows, almost as if it was a tour bus.it was laying flat in the air hovering about a 100 yards above the ground motionless and silent. Ilost all sence of time and do not remember the hour that followed. I was a teen at the time my father was driving and distictly told me to never mention this, not evan to him.I am in law eforcement now and have never repeated the experience, this was a one time event.